{"id":285,"date":"2010-05-31T01:00:00","date_gmt":"2010-05-31T07:00:00","guid":{"rendered":"http:\/\/blog.supportpro.com\/2010\/05\/why-do-we-get-a-ssl-error-certificate-not-trusted\/"},"modified":"2026-06-22T05:05:56","modified_gmt":"2026-06-22T11:05:56","slug":"why-do-we-get-a-ssl-error-certificate-not-trusted","status":"publish","type":"post","link":"https:\/\/www.supportpro.com\/blog\/why-do-we-get-a-ssl-error-certificate-not-trusted\/","title":{"rendered":"SSL Certificate Not Trusted Error: Causes and Fixes"},"content":{"rendered":"<p>Have you ever wondered why, when you access a website through a secure connection, you get a warning that the certificate is not issued by a trusted authority?<\/p>\n<p>In most cases, the\u00a0 exact warning message\u00a0 that you will get depends on your browser as follows:<\/p>\n<p>IE: The security certificate presented by this website was not issued by a trusted certificate authority!<\/p>\n<p>Firefox: The certificate is not trusted because the issuer certificate is unknown. (Error code: sec_error_unknown_issuer)<\/p>\n<p><!--more--><\/p>\n<p>Chrome: The site&#8217;s security certificate is not trusted!<\/p>\n<p>Safari: Authentication failed because the server certificate is not trusted!<\/p>\n<p>If you get any of the above warnings, it means your browser does not trust the SSL certificate. This is because it is not signed by a company the browser recognises as trusted.<\/p>\n<p>Here, in this case, the above two most common reasons for this warning are as shown below:<\/p>\n<p>a. The website will be using a private SSL certificate, but it is missing a CA (Certificate Authority) certificate.<\/p>\n<p>The solution in this case is to purchase a private SSL Certificate, which is issued for a specific domain or website by a trusted authority.<\/p>\n<p>b. The website will be using a self-signed or a free SSL Certificate.<\/p>\n<p>The solution here is to reinstall the SSL certificate with the correct CA bundle. The CA bundle is actually provided by the SSL vendor and should be included in the private SSL package.<\/p>\n<p>If you require help, co<a href=\"https:\/\/www.supportpro.com\/requestquote.php\">ntact SupportPRO Server Admin<\/a><\/p>\n<p style=\"text-align: center;\"><!--HubSpot Call-to-Action Code --><span id=\"hs-cta-wrapper-9d590242-d641-4383-94b4-8cfd62f0af6b\" class=\"hs-cta-wrapper\"><span id=\"hs-cta-9d590242-d641-4383-94b4-8cfd62f0af6b\" class=\"hs-cta-node hs-cta-9d590242-d641-4383-94b4-8cfd62f0af6b\"><!-- [if lte IE 8]><\/p>\n\n\n\n\n\n<div id=\"hs-cta-ie-element\"><\/div>\n\n\n<![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2725694\/9d590242-d641-4383-94b4-8cfd62f0af6b\"><img decoding=\"async\" id=\"hs-cta-img-9d590242-d641-4383-94b4-8cfd62f0af6b\" class=\"hs-cta-img\" style=\"border-width: 0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2725694\/9d590242-d641-4383-94b4-8cfd62f0af6b.png\" alt=\"Server not running properly? Get A FREE Server Checkup By Expert Server Admins - $125 Value\" \/><\/a><\/span><script charset=\"utf-8\" src=\"https:\/\/js.hscta.net\/cta\/current.js\"><\/script><script type=\"text\/javascript\"> hbspt.cta.load(2725694, '9d590242-d641-4383-94b4-8cfd62f0af6b', {}); <\/script><\/span><!-- end HubSpot Call-to-Action Code --><\/p>\n\n\n<div class=\"wp-block-media-text alignwide has-media-on-the-right is-stacked-on-mobile is-vertically-aligned-center has-white-background-color has-background\"><div class=\"wp-block-media-text__content\">\n<p class=\"has-large-font-size wp-block-paragraph\">Facing issues? <\/p>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\">Our technical support<br>engineers can solve it. <\/p>\n\n\n\n<!--HubSpot Call-to-Action Code --><span class=\"hs-cta-wrapper\" id=\"hs-cta-wrapper-3350a795-db50-482f-9911-301930d1b1be\"><span class=\"hs-cta-node hs-cta-3350a795-db50-482f-9911-301930d1b1be\" id=\"hs-cta-3350a795-db50-482f-9911-301930d1b1be\"><!--[if lte IE 8]><div id=\"hs-cta-ie-element\"><\/div><![endif]--><a href=\"https:\/\/cta-redirect.hubspot.com\/cta\/redirect\/2725694\/3350a795-db50-482f-9911-301930d1b1be\" ><img decoding=\"async\" class=\"hs-cta-img\" id=\"hs-cta-img-3350a795-db50-482f-9911-301930d1b1be\" style=\"border-width:0px;\" src=\"https:\/\/no-cache.hubspot.com\/cta\/default\/2725694\/3350a795-db50-482f-9911-301930d1b1be.png\"  alt=\"Contact Us today!\"\/><\/a><\/span><script charset=\"utf-8\" src=\"https:\/\/js.hscta.net\/cta\/current.js\"><\/script><script type=\"text\/javascript\"> hbspt.cta.load(2725694, '3350a795-db50-482f-9911-301930d1b1be', {\"useNewLoader\":\"true\",\"region\":\"na1\"}); <\/script><\/span><!-- end HubSpot Call-to-Action Code -->\n<\/div><figure class=\"wp-block-media-text__media\"><img fetchpriority=\"high\" decoding=\"async\" width=\"904\" height=\"931\" src=\"https:\/\/www.supportpro.com\/blog\/wp-content\/uploads\/2022\/09\/Free-server-checkup.png\" alt=\"guy server checkup\" class=\"wp-image-12943 size-full\" srcset=\"https:\/\/www.supportpro.com\/blog\/wp-content\/uploads\/2022\/09\/Free-server-checkup.png 904w, https:\/\/www.supportpro.com\/blog\/wp-content\/uploads\/2022\/09\/Free-server-checkup-291x300.png 291w, https:\/\/www.supportpro.com\/blog\/wp-content\/uploads\/2022\/09\/Free-server-checkup-768x791.png 768w, https:\/\/www.supportpro.com\/blog\/wp-content\/uploads\/2022\/09\/Free-server-checkup-585x602.png 585w\" sizes=\"(max-width: 904px) 100vw, 904px\" \/><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Have you ever wondered why, when you access a website through a secure connection, you get a warning that the certificate is not issued by a trusted authority? In most&hellip;<\/p>\n","protected":false},"author":4,"featured_media":17628,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-285","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Learn why browsers show the \u201cSSL Certificate Not Trusted\u201d error and how to fix it by installing a trusted SSL certificate and CA bundle.\" \/>\n\t<meta name=\"robots\" content=\"max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n\t<meta name=\"author\" content=\"SupportPRO Admin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.supportpro.com\/blog\/why-do-we-get-a-ssl-error-certificate-not-trusted\/\" \/>\n\t<meta name=\"generator\" 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